Penggunaan bahan nilon termoplastik sebagai bahan basis gigi tiruan berkembang pada masa sekarang ini, namun disamping kelebihannya dalam hal estetis, bahan basis gigi tiruan nilon termoplastik juga memiliki kekurangan yaitu stabilitas warna yang rendah, sulit dipoles sehingga menghasilkan permukaan yang lebih kasar dan penyerapan air yang tinggi. Salah satu metode untuk mengurangi penyerapan air adalah dengan menambahkan serat kaca pada bahan basis gigi tiruan. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan serat kaca terhadap kekasaran permukaan dan penyerapan air bahan basis gigi tiruan nilon termoplastik tanpa dan dengan penambahan serat kaca. Jenis penelitian ini adalah eksperimental laboratoris. Sampel pada penelitian ini adalah nilon termoplastik berbentuk silindris berukuran diameter 15 ± 1 mm dan ketebalan 0,5 ± 0,1 mm. Jumlah seluruh sampel adalah 32 dengan 8 sampel untuk setiap kelompok. Sampel tersebut di uji nilai kekasaran permukaan dan penyerapan air. Analisis statistik menggunakan uji ANOVA satu arah dan LSD menunjukkan terdapat perbedaan signifikan terhadap kekasaran permukaan dengan nilai p = 0,0001 (p < 0,05) dan terhadap penyerapan air p = 0,001 (p < 0,05). Sebagai kesimpulan, penambahan serat kaca 0,5%, 1%, dan 1,5% pada bahan basis gigi tiruan nilon termoplastik dapat menurunkan nilai penyerapan air dan meningkatkan kekasaran permukaan bahan basis gigi tiruan nilon termoplastik.
Results : There was an effect of thermocycling with 2000 cycle as the simulation of oral cavity condition for 2 years denture usage on water sorption and color stability in group without E-glass fiber and group with addition of 1% and 1,5% of E-glass fiber. One way ANOVA test showed that there was an effect of E-glass fiber addition on water sorption and color stability of nylon thermoplastic denture base material with and without thermocycling.Conclusion : According to this study, thermocycling shows an effect on water sorption and color stability. Eglass fiber addition to denture base material also affects water sorption and color stability as seen from discoloration of denture base material with the addition of 1% to 1,5% E-glass fiber in thermocycled group is not visible and acceptable (E < 3,3), while in group without E-glass fiber addition, discoloration is clearly seen visually and unacceptable (E > 3,3).
The Metal porcelain crowns are still widely used because of the clinically satisfactory mechanical, esthetic, marginal and internal adaptation properties and affordable, but metal collars on the marginal labial are not aesthetically acceptable because of dark shadows in the cervical region which can be overcome by marginal porcelain butt joint coping design on the marginal labial. Recent clinical studies have introduced a type of cobalt chromium coping material that is biologically more biocompatible than nickel chromium which can cause allergic reactions. In this study, Ni-Cr and Co-Cr coping materials were used with full metal collarless and modified metal collarless coping designs. The purpose of this study was to determine the effect of material and coping design on the marginal adaptation of metal porcelain crowns. This type of research is experimental laboratory. The typodontic central incisor teeth were prepared and duplicated using CAD/CAM to become zirconia and implanted in acrylic resin blocks for the manufacture of 24 porcelain metal samples. The application of an opaque layer on both coping designs was burned at 975˚C followed by the application of dentin, enamel and glazing.
Food safety is an obligation that much be carried out by the food industry, especially in the fisheries sector to ensure that the products marketed are safe for consumption by consumers. Public safety and health must be protected from food that does not meet the requirements and from losses due to improper food production, distribution and trade. This study aims to identify the use of dangerous chemical materials like formalin and rhodamine B in processed fishery products, as well as to determine the origin of suppliers of products sold in the Selayar Islands Regency. The method used in this research was observation. Determination of the location and sampling used accidental sampling. Samples was taken from several traditional markets that sold fishery products in Selayar Islands Regency. The samples were analyzed the quality and safety parameters in the Laboratory of the Center Implementing the Quality of South Sulawesi Fisheries Products, the Laboratory for Animal Husbandry at Hasanuddin University, the Microbiology Laboratory Department of TPHP Pangkep, and the South Sulawesi Health Laboratory. The result shows that the parameters of quality and food safety products are in accordance with SNI and there is not used of formalin and rhodamine B in any fishery products.
Introduction: The disfigurement associated with the loss of an eye can cause significant physical and psychological problems. Therefore, a good ocular prosthesis is needed to restore the patient's quality of life. One of the factors that determine the quality of an ocular prosthesis is accurately impression. In the case of enucleation where the eyes socket has a soft and movable tissue bad will result inaccurate impression. The difficulty of post enuclation impression in such case is the compression of the tissue eyes socket. This case report will discuss the modification in functional impression technique using a modified custom tray. Case: A 39-year-old male patient came to Dental Hospital Universitas Sumatera Utara with chief complaint an unaesthetic and loose left stock eye that had been used for 10 years. Clinical examination shows moderate depth eye socket with soft and movable tissue. Management: The functional impression technique was modified using a self-curing clear acrylic sclera without handle as a custom tray with 2 mm reduction on the intaglio surface and light body polyvinyl siloxane as impression material. Discussion: The aim of this modification is to avoid the tendency of the eye socket to compress during impression taking and to achieve a natural contour of the eyelid convexity because of the absence of the tray handle so the patient can close their eyes. Conclusion: This technique produces an ocular prosthesis that has a good retention with excellent aesthetic result.
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